Pigment for paper and paper laminate
US9481797B2 · kind B2 · utility
1Cited by
20References
15Claims
0Family size
Assignee
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Key dates
| Filing date | Aug 9, 2011 |
| Grant date | Nov 1, 2016 |
| Priority date | — |
| Expiry date | Aug 9, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/257
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A pigment mixture comprising (a) pigment particles, (b) colloidal spacer particles dispersed on surfaces of the pigment particles, and (c) carrier particles, wherein the pigment particles with colloidal spacer particles are dispersed on surfaces of the carrier particles. A pigment mixture of titanium dioxide pigment particles having colloidal silica spacer particles on surfaces of the titanium dioxide, the titanium dioxide and colloidal silica attached to surfaces of diatomaceous earth carrier particles, provides improved optical efficiency of the pigment and improved retention in a paper fiber matrix.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.